Wikimedia
Wikipedia: Albert Einstein
In this Spanish-language entry, grasp a concrete understanding of a complicated man whose discoveries impacted society more than any other scientist. This site chronicles the life and accomplishments of Albert Einstein. It also studies...
PBS
Pbs: A Classical and Relativistic Trip to a Black Hole
This PBS site is a classroom activity that takes a trip to a black hole. Students apply calculations on distance, velocity, acceleration, time, circular motion, density, and more.